diff options
Diffstat (limited to 'deps/npm/node_modules/define-properties/test/index.js')
-rw-r--r-- | deps/npm/node_modules/define-properties/test/index.js | 125 |
1 files changed, 125 insertions, 0 deletions
diff --git a/deps/npm/node_modules/define-properties/test/index.js b/deps/npm/node_modules/define-properties/test/index.js new file mode 100644 index 0000000000..3387f6bc7b --- /dev/null +++ b/deps/npm/node_modules/define-properties/test/index.js @@ -0,0 +1,125 @@ +'use strict'; + +var define = require('../'); +var test = require('tape'); +var keys = require('object-keys'); + +var arePropertyDescriptorsSupported = function () { + var obj = { a: 1 }; + try { + Object.defineProperty(obj, 'x', { value: obj }); + return obj.x === obj; + } catch (e) { /* this is IE 8. */ + return false; + } +}; +var descriptorsSupported = !!Object.defineProperty && arePropertyDescriptorsSupported(); + +var hasSymbols = typeof Symbol === 'function' && typeof Symbol('foo') === 'symbol'; + +test('defineProperties', function (dt) { + dt.test('with descriptor support', { skip: !descriptorsSupported }, function (t) { + var getDescriptor = function (value) { + return { + configurable: true, + enumerable: false, + value: value, + writable: true + }; + }; + + var obj = { + a: 1, + b: 2, + c: 3 + }; + t.deepEqual(keys(obj), ['a', 'b', 'c'], 'all literal-set keys start enumerable'); + define(obj, { + b: 3, + c: 4, + d: 5 + }); + t.deepEqual(obj, { + a: 1, + b: 2, + c: 3 + }, 'existing properties were not overridden'); + t.deepEqual(Object.getOwnPropertyDescriptor(obj, 'd'), getDescriptor(5), 'new property "d" was added and is not enumerable'); + t.deepEqual(['a', 'b', 'c'], keys(obj), 'new keys are not enumerable'); + + define(obj, { + a: 2, + b: 3, + c: 4 + }, { + a: function () { return true; }, + b: function () { return false; } + }); + t.deepEqual(obj, { + b: 2, + c: 3 + }, 'properties only overriden when predicate exists and returns true'); + t.deepEqual(Object.getOwnPropertyDescriptor(obj, 'd'), getDescriptor(5), 'existing property "d" remained and is not enumerable'); + t.deepEqual(Object.getOwnPropertyDescriptor(obj, 'a'), getDescriptor(2), 'existing property "a" was overridden and is not enumerable'); + t.deepEqual(['b', 'c'], keys(obj), 'overridden keys are not enumerable'); + + t.end(); + }); + + dt.test('without descriptor support', { skip: descriptorsSupported }, function (t) { + var obj = { + a: 1, + b: 2, + c: 3 + }; + define(obj, { + b: 3, + c: 4, + d: 5 + }); + t.deepEqual(obj, { + a: 1, + b: 2, + c: 3, + d: 5 + }, 'existing properties were not overridden, new properties were added'); + + define(obj, { + a: 2, + b: 3, + c: 4 + }, { + a: function () { return true; }, + b: function () { return false; } + }); + t.deepEqual(obj, { + a: 2, + b: 2, + c: 3, + d: 5 + }, 'properties only overriden when predicate exists and returns true'); + + t.end(); + }); + + dt.end(); +}); + +test('symbols', { skip: !hasSymbols }, function (t) { + var sym = Symbol('foo'); + var obj = {}; + var aValue = {}; + var bValue = {}; + var properties = { a: aValue }; + properties[sym] = bValue; + + define(obj, properties); + + t.deepEqual(Object.keys(obj), [], 'object has no enumerable keys'); + t.deepEqual(Object.getOwnPropertyNames(obj), ['a'], 'object has non-enumerable "a" key'); + t.deepEqual(Object.getOwnPropertySymbols(obj), [sym], 'object has non-enumerable symbol key'); + t.equal(obj.a, aValue, 'string keyed value is defined'); + t.equal(obj[sym], bValue, 'symbol keyed value is defined'); + + t.end(); +}); |